Self-stratifying coatings provide better corrosion protection
Tuesday, 28 June 2011
The influence of decorative and anti-corrosive pigments on the distribution and protective properties of self-stratifying coating systems was investigated.
Paint applied as a single layer and its spontaneous separation to form a primer and a top coat is one of the newest concepts of effective and economical application of two layers in one step. Ewa Langer from the Institute for Polymer Engineering and Dyes, Poland, has investigated the influence of decorative and anti-corrosive pigments on the distribution and protective properties of self-stratifying epoxy/acrylic coating systems. The results of investigations of self-stratifying coatings in a salt spray chamber prove that such systems have comparable or even better corrosion protection properties compared to classical two-layered systems containing the same resins and pigments. The best adhesion to substrate, interlayer cohesion and pigment distribution was obtained in systems containing micaceous iron oxide as anticorrosive pigment. Ewa Langer will talk about self-stratifying coatings at the European Coatings Conference "Anti-corrosive coatings" on the 7th September in Berlin, Germany.